:root {
  --bg: #ffffff;
  --text: #333333;
  --muted: #777777;
  --accent: #5a7a98;
  --link: #2a5a8a;
  --rule: #d8d8d8;
  --side-bg: #f6f6f6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 Verdana, "Segoe UI", Arial, sans-serif;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

.banner {
  border-bottom: 1px solid var(--rule);
  padding: 44px 24px 16px 164px;
  min-height: 150px;
  background: url(/img/idea.jpg) no-repeat 12px 0;
}
.banner h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: 1px;
  color: var(--accent);
}
.banner h1 a { color: inherit; }
.banner p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.layout {
  display: flex;
  max-width: 1100px;
  margin: 0 auto;
}

nav.sidebar {
  flex: 0 0 190px;
  padding: 24px 16px;
  background: var(--side-bg);
  border-right: 1px solid var(--rule);
  min-height: calc(100vh - 151px);
}
nav.sidebar h3 {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--muted);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 4px;
}
nav.sidebar ul { list-style: none; margin: 0; padding: 0; }
nav.sidebar li { margin: 4px 0; }
nav.sidebar a[aria-current="page"] { font-weight: bold; color: var(--text); }

main {
  flex: 1;
  padding: 24px 32px 48px;
  min-width: 0;
}
main h2 {
  margin-top: 0;
  color: var(--accent);
  font-size: 22px;
}
main h3 {
  margin: 28px 0 8px;
  font-size: 17px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 4px;
}

.post-meta { margin-top: -8px; color: var(--muted); font-size: 13px; }
.post-list { list-style: none; padding: 0; }
.post-list li { margin: 8px 0; display: flex; gap: 12px; }
.post-list time {
  flex: 0 0 138px;
  color: var(--muted);
  font-size: 13px;
}

pre, code {
  font-family: Consolas, Menlo, monospace;
  font-size: 13px;
  background: var(--side-bg);
}
code { padding: 1px 4px; }
pre {
  padding: 10px 12px;
  border: 1px solid var(--rule);
  overflow-x: auto;
}
pre code { padding: 0; background: none; }

.pubs li { margin-bottom: 12px; }
.pubs .award { font-weight: bold; font-style: italic; }

footer.site {
  border-top: 1px solid var(--rule);
  padding: 12px 24px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 700px) {
  .layout { flex-direction: column; }
  nav.sidebar {
    flex-basis: auto;
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    padding: 12px 16px;
  }
  nav.sidebar h3 { display: none; }
  nav.sidebar ul { display: flex; flex-wrap: wrap; gap: 4px 16px; }
  main { padding: 20px 16px 40px; }
  .banner {
    padding: 22px 16px 12px 92px;
    min-height: 86px;
    background-size: 70px auto;
    background-position: 12px 4px;
  }
}